package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishPageQueryDTO;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.DishVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    public SetmealServiceImpl(SetmealDishMapper setmealDishMapper) {
        this.setmealDishMapper = setmealDishMapper;
    }

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {

        // 保存套餐数据
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);

        Long setmealId = setmeal.getId();

        //保存套餐和菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealId);
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        Long total = page.getTotal();
        return new PageResult(total, page.getResult());
    }

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @Transactional
    public SetmealVO getById(Long id) {
        log.info("根据id查询套餐：{}",id);

        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDish = setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes( setmealDish);

        return setmealVO;
    }

    /**
     * 启用禁用套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        log.info("套餐起售停售：{}",id);

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //修改套餐数据
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);

        //修改套餐和菜品的关联关系
        //删除当前套餐关联的菜
        setmealDishMapper.deleteBySetmealId(Collections.singletonList(setmealDTO.getId()));
        //插入当前套餐关联的菜
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(dish -> dish.setSetmealId(setmealDTO.getId()));
        setmealDishMapper.insertBatch(setmealDTO.getSetmealDishes());
    }

    /**
     * 批量删除套餐，同时删除套餐和菜品的关联数据
     *
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        //是否在售
        List<Setmeal> setmealList = setmealMapper.getByIds(ids);
        setmealList.forEach(setmeal -> {
            if (setmeal.getStatus() == StatusConstant.ENABLE)
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
        });

        setmealMapper.delete(ids);
        setmealDishMapper.deleteBySetmealId(ids);

    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
